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23. Given = [1, 7, 9] and,a) Find the angle between= [-2, 5, -3] and...

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23. Given = [1, 7, 9] and,a) Find the angle between= [-2, 5, -3] and w = [4, -6, 8].and w. 13 Marks]b) Are the vectors and and w coplanar? Show your answer algebraically. [3 Marks]

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23. Given = [1, 7, 9] and,a) Find the angle between= [-2, 5, -3] and w = [4, -6, 8].and w. 13 Marks]b) Are the vectors and and w coplanar? Show your answer algebraically. [3 Marks]

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